Tuft setting anchor and apparatus for forming and applying the same



June 22, 1937. c, O T

'lfUFT SETTING ANCHOR AND APPARATUS FOR FORMING AND APPLYING THE SAMEOriginal Filed Sep t. '2, 1950 s SheetsSheet 1 llll l I I ll INVENTORQ7zraci Jobs t firm/M 41M ATTORNEY-9' c. JOBST 2,084,345 TUFT SETTINGANCHOR AND APPARATUS FOR FORMING AND APPLYING THE SAME June 22, 1937.

Original Filed Sept. 2.,- 1930 3 Sheets-Sheet 2 llll... a

INVENTOR (anraaf J ,sz 7' 10mm il m ATTORNEY- June 22, 1937. c. JOBST2,084,345

TUFT SETTING ANCHOR AND APPARATUS FOR FORMING AND APPLYING THE SAMEOriginal Filed Sept. 2, 1930 3 Sheets-Sheet 3 4 [0 G 1 6/ TL IEWJIIIL-LC) Q 0 5 0 -c 1'7 71; Car/rec? Jaz f BY W l- I v ATTORNEYS PatentedJune 22, 1937 PATENT OFFICE TUFT SETTING ANCHOR AND APPARATUS FORFORMING AND APPLYING THE SAME Conrad Jobst, Toledo, Ohio, assignor toThe Toledo Automatic Brush Machine Company, Toledo, Ohio, a corporationof Ohio Application September 2, 1930, Serial No. 479,371 RenewedOctober 6, 1934 15 Claims.

The invention relates to the manufacture of brushes such for instance astooth brushes and of that type in which the tufts are secured in thebores inthe brush back by so-called anchors.

These anchors are usually stamped from sheet metal and are of variousforms but usually provided with a straight edge for engaging thebristles of the tuft, with a V-shaped notch in the opposite edge formingprongs which during the setting of the tuft are laterally expandedintothe sides of the bore to prevent disengagement.

One'of the objections to the setting of tufts by this method is that asthe anchors are very small, it is exceedingly diflicult to feed theminto 1-5-engagement with the tufts in the short interval of time allowedfor this operation. Other objections are that the anchors being shearedfrom sheet metal present sharp edges which frequently cut-the bristlesin contact therewith. Thus in 20 comparison with the setting of thetufts by certain other securing devices, such for instance as round wirestaples, the anchor method is neither as satisfactory as a securingmeans nor capable of as high a rate of production.

.It is the object of the present invention to obtain a construction ofanchor and a method of forming and setting the tufts with the same whichis capable of a high rate of production on automatic machines. It is afurther object to obtain an anchor which has a rounded edge in contactwith the bristles so as not to injure the same and one which can be madeexceedingly small in dimensions, particularly in depth so as to beapplicable tothe setting of tufts in very thin brush backs. This latterfeature is of great commercial value in the manufacture of tooth brusheswith celluloid handles, as the cost of this material is a large factorin the total cost of the brush; With these objects in view the inven-40; tion consists in the novel construction of anchor and method andapparatus for setting the tufts in the same as hereinafter set forth.

-In the drawings:

Figure 1 is a side elevation of a tuft setting s, mechanism in which myimprovements are' applied; 1

Figure 1A is an enlarged view of a portion of Figure 1 shown partly insection;

Figure 2 is a sectional plan view thereof;

Figure 3 is a front end elevation;

Figures 4 and 5 are sections substantially on line 4-4 of Figure 3,illustrating in different positions the mechanism for notching theanchors;

Figure 16 is an enlarged elevation of a portion of re an Figure '7 is across section thereof on line 'l-'I of Figure 6;

Figure 8 is a bottom plan view of the parts shown in Figures 6 and '7;

Figure 9 is an enlarged perspective view of one of the anchors detached;

Figure 10 is an enlarged cross section through the brush back showingthe anchor in position in one of the tuft receiving bores;

Figure 11 is an enlarged elevation of the anchor strip as shown inFigure 6 showing in full lines a severed anchor and in dotted lines theportion of strip from which it is severed and also showing a driver ininitial engagement with the severed anchor such as to change the same indriving to the form shown in Figure 10.

A is a: recip-rocatory nozzle of a tuft setting mechanism having alateral slot B through which the bristles are introduced after firstbeing separated and delivered from the mass by suitable mechanism (notshown). C is the central longitudinal channel in the nozzle throughwhich the bent or folded bristles are passed and introduced into theregistering bore of a brush back, and D is a reciprocatory driver forpushing the bristles through this channel. All of these parts may bethrough the channel C into the bore'in the brushv back where it islaterally expanded into the sides of the bore to prevent disengagement.As above described, it is exceedingly difiicult to feed elements assmall as these anchors so as to suc cessively register them with thedriver and without danger of clogging or interfering with each other. Ihave eliminated the difficulty by substi-' tuting for the separateanchors a continuous strip which is fed into the nozzle and from whichthe anchors are successively sheared and deposited directly in the'pathof the'driver. This method has the further advantage that the continuousstrip from which the anchors are sheared can' be formed with a roundededge which forms the contact with the bristles, the sheared edges beingimbedded in the side walls of the bore. 'Also by this method thenotching of the anchors toform the laterally separable prongs can beaccom--' plished at a point adjacentto the nozzle and beyond the feedmechanism for the strip. This. insures very accurate forming andpositioning of,

the anchors and also greatly facilitates the feeding of the strip whichin its imperforate portions has no tendency to bend or skew.

The method above described can be carried out by a simple constructionof mechanism as follows: E is the strip or ribbon for forming the,

anchors which has a width considerably in excess of its thickness andsuitable for the depth of the anchor. This strip is fed laterally intothe nozzle by means of feed rollers F and F which are intermittentlyactuated by a ratchet wheel G and a latch pawl H, the latter beingcarried by a bell crank lever I which in turn is actuated by areciprocatory slide J, bell crank lever K and cam L. The cam L may bemounted on a shaft M which is also provided with cranks M M foractuating the nozzle and the driver. The strip E after passing the feedrolls F F extends through a guide N which directs it laterally into thenozzle A in rear of the bristles entering the slot B. The plane of thefeed of the strip is, however, slightly off-set from the plane of thechannel C and a shearing member is located with its shearing edge in thehorizontal plane of the bottom of said channel C. A co-operating movableshearing member P which is of a width equal to the width of the anchoris normally spaced from the member 0 for the feeding of the striptherebetween and subsequently is moved to shear the anchor E from thestrip E and simultaneously move it into the plane of the channel C so asto be in the path ofthe driver D. This member P also forms one wall ofthe channel C after the anchor is sheared which in cooperation with theopposite wall Q will accu rately hold the anchor in the path of thedriver. Thus the anchor when severed from the strip can not becomemisplaced, but is positively transferred into the path of the driver andheld in alignment therewith during the driving operation. The anchorwhen advanced by the driver into the nozzle passes between plates C andC which have grooved edges C for engaging and guiding the opposite endsof said anchor holding it in alignment with the driver until deliveryfrom the end of the nozzle into the registering bore in the brush back.I

The notching of the anchors is accomplished at a point intermediate thefeed rolls F F and the upper end of the anchor strip E. This notching ispreferably accomplished by a pair of co-operating shear members R and R.The shear member R is in the form of a'peripherally V-shape grooved diskwhich has a notch or cut away seg ment presenting a shearing face R witha V- shaped notch therein. The member R has its peripheral portion of across section to fit in the V-shaped groove in the member R and is alsonotched or cut away to present a shearing face R opposite to the face RThe member R may be clamped in position by a clamping bolt S but themember R is mounted on a rock shaft S journalled in a bearing in theguide N. This rock shaft is intermittently actuated through the mediumof a rock arm S v which-extends laterally into a recess T in the housingT which latter forms the guide for the reciprocatory nozzle. It is to beunderstood that all of the parts of the strip feeding mechanism aremounted on the shank A of the nozzle A so as'to maintain a fixedrelation thereto, but during movement of the nozzle in its housing T therock, arm 5 will alternately contact with shoulders T and T at oppositeends of the recess T. Thus at a certain point in the movement of thenozzle the rock arm S will rock the member R so as to cause the shearingface R to shear a notch inthe strip and enter the V-shaped groove inthemember R. While thus engaged the strip is' firmly held againstlongitudinal movement at which time the shearing of the anchor from thestrip occurs. erably in the form of a lever pivoted at P and having itsouter edge cammed at P -and P to co-operate with cam faces in thehousing member T so as to rock said lever at a certain point in themovement of the nozzle. All of these parts are so timed that theshearing of the anchor from the end of the strip and the movement of thesame laterally into the path of the driver occurs slightly in advance ofcontact of the anchor by said driver and subsequent to the feeding ofthe bristles through the slot B into registration with the channel C.Thus the following movement of the driver will force the anchor againstthe bristles and into engagement with the grooved guides C carrying thefolded tuft through the nozzle and into the registering bore in thebrush back. The end of the'driver is so shaped that at the completion ofthe driving movement it will spread the prongs of the anchor laterally,imbedding them in the side Walls of the bore so as to securely hold themfrom disengagement.

The above described mechanism is capable of high speed operation,for'all of its parts are positively actuated in accurately timedrelation while the anchor and the bristle tuft are. accurately guidedduring movement thereof. By reason of this it is possible to use anchorswhich are smaller, particularly in the dimension of depth, thanconstructions that have heretofore been used, so

that the brush backs may becorrespondingly re-* duced in thickness withthe saving of expensive material. All sharp edges. produced by shearingthe brush per se in this application, as this forms the subject matterof another patent. I

What I claim as my invention is: 1. In a tuft setting mechanism, thecombine application for tion with a nozzle for receiving the tuft, anda" driver in rectilinear alignment therewith, of means for feeding acontinuous flat ribbon strip laterally into said nozzle out of alignmentwith said driver and means for shearing an anchor' The shearing memberP'is pref-' from the end portion of said strip into the path of saiddriver.

2. In a tuft setting mechanism the combination with a nozzle forreceiving the bristle and a driver, of means for intermittently feedinga continuous strip laterally into saidnozzle in a plane spacedareciprocatory driver, of mechanism carried by said nozzle forintermittently feeding a strip thereinto and in a plane spaced from theplane of the driver, means for notching the strip atone point during theinterval of rest of said intermittent feed, and means for shearing ananchor from the end portion of said strip and moving the same into theplane of said driver while said strip is locked by the notching means.

4. In a tuft setting mechanism, the combination with a nozzle forreceiving the bristles, and a driver, of means for intermittentlyfeeding a continuous strip laterally to said nozzle in a plane spacedfrom the plane of the driver, a shearing member movable to sever the endportion of said strip and to carry the same into the plane of thedriver, said member constituting a guiding wall for holding the severedanchor in the path of the driver.

5. In a tuft setting mechanism, the combination with a nozzle forreceiving the bristles, and a driver, of means for intermittentlyfeeding a continuous strip laterally into said nozzle in a plane spacedfrom the plane of the driver, a stationary shearing member adjacent tothe plane of feed with its shearing edge located in the transverse planeof one edge of the driver, a cooperating movable shearing member'normally spaced from said stationary shearing member for the feeding ofthe end of the strip therebetween, and means for moving said movableshear member to sever an anchor from said strip, carrying the same intothe plane of the driver, said movable shearing member also constitutinga guiding wall for holding the anchor in the path of the driver.

6. In a tuft setting mechanism, the combination with a reciprocatorytuft setting nozzle adapted to receive the bristles for the tuft and areciprocatory driver, of mechanism carried by said nozzle forintermittently feeding a strip thereinto and in a plane spaced from theplane of the driver, guides forming off-set channels through which saidstrip and said driver are respectively moved, said channels having aninterconnecting portion and a shearing member movable in saidinter-connecting portion to sever an anchor from the end of the stripand to carry the same into the plane of the driver.

7. In a tuft setting mechanism, the combination with a reciprocatorytuft setting nozzle adapted to receive bristles for the tuft, areciprocatory driver within said nozzle and a station-.

ary guide in which said nozzle reciprocates, of mechanism carried bysaid nozzle for intermittently feeding a strip thereinto and in a planespaced from the plane of the driver, a shearing member carried by saidnozzle for severing the end portion of the strip and moving the sameinto the plane of the driver, and means on said stationary guide foractuating said shearing member by the relative movement of said nozzle.

8. In a tuft setting mechanism, the combination with a reciprocatorytuft setting nozzle and a reciprocatory driver, of mechanism carried bysaid nozzle for intermittently feeding a strip thereinto comprisingintermittently actuated feed rolls for advancing the strip, a guide forholding the advancing strip in a plane spaced from the plane of thedriver, notching means for said strip While in said guide and shearingmeans for severing the end portion of said strip and for moving the sameinto the path of the driver, a stationary guide for the reciprocatingnozzle and means on said stationary guide for actuating said notchingand shearing means during the reciprocation of the nozzle.

9. An anchor strip for use in tuft setting mechanisms provided withparallel edges, one of which is rounded and a series of notches in theopposite edge between which a strip maybe sheared to form individualanchors.

10. An anchor for securing a folded bristle tuft in the bore of a brushback having a. smooth laterally extending edge for engaging the fold inthe bristle tuft, parallel longitudinally extending edges of smallerdimension than said laterally extending edge for embedding in theopposite walls of said bore and a V-shaped notch in the edge opposite tosaid laterally extending edge whereby, after insertion, the notched edgeis expanded into the sides of the bore.

11. An anchor strip for a tuft setting mechanism for a brush makingmachine provided with parallel edges and a series of notches ,in one ofsaid edges spaced by a dimension greater than the distance between saidedges, said strip having a substantially straight end edge forming oneside of an individual anchor, said strip being adapted to be shearedsuccessively between said notches to successively form a series ofindividual anchors.

12. In a method of setting tufts in brush backs, the steps comprisingintermittently feeding a continuous strip laterally into the tuftsetting nozzle in a plane spaced from the path of the driver and, duringeach interval of rest, shearing an anchor from the end portion of saidstrip and carrying the same into the path of the driver.

13. In a method of setting tufts in brush backs,

the steps comprising feeding a continuous strip having a series ofnotches therein into a tuft setting nozzle in a plane spaced from thepath of the driver, moving a shearing element transversely to saidcontinuous strip and transversely to the path 'of said driver, therebyshearing the end portion of said strip at a point intermediatesuccessive notches and carrying. the anchor so formed into the path ofthe driver with the sheared edge extendingin the direction of movementof said driver, moving said anchor through the path of said driver intoa brush back, and spreading the side portions of said anchor on oppositesides of said notch to embed the same into the brush back.

14. In a tuft setting mechanism, the combination of a nozzle forreceiving the tuft, a driver in rectilinear alignment therewith, meansfor feeding a continuous fiat ribbon strip into said nozzle out ofalignment with said driver and means for shearing an anchor from the endportion of said strip and moving the same into the path of said driver.

15. An anchor for securing a folded bristle tuft in the bore of a brushback, said anchor before driving having a smooth laterally extendingedge for engaging the fold in the bristle tuft and of a dimensionsubstantially equal to the diameter of said bore, parallellongitudinally extending edges of smaller dimension than said laterallyextending edge and at right angles thereto, a substantially V-shapednotch in the edge opposite said laterally extending edge and with aportion between the inner end of said notch and bristle engaging edge ofa dimension less than the depth of the notch whereby in driving theportion at the inner end of said notch will be bent and the portions onopposite sides of said notch will be expanded with their outer edgesdiverging in a directionoutwardly of said bore and with their outercorners embedded in the side walls of the bore.

CONRAD JOBST.

